This was a bug due to the late release of Windows installers. You can
simply copy the file from
/openmpi-source/orte/etc/openmpi-default-hostfile to
C:\OpenMPI\openmpi-1.6\installed\etc\. This problem only happens when
you build from the released source, but not with the Windows installers.

Shiqing

On 2012-06-18 9:31 PM, VimalMathew_at_[hidden] wrote:
>
> So I configured and compiled a simple MPI program.
>
> Now the issue is when I try to do the same thing on my computer on a
> corporate network, I get this error:
>
> C:\OpenMPI\openmpi-1.6\installed\bin>mpiexec MPI_Tutorial_1.exe
>
> --------------------------------------------------------------------------
>
> *Open RTE was unable to open the hostfile:*
>
> *C:\OpenMPI\openmpi-1.6\installed\bin/../etc/openmpi-default-hostfile*
>
> *Check to make sure the path and filename are correct.*
>
> *--------------------------------------------------------------------------*
>
> *[SOUMIWHP5003567:01884] [[37936,0],0] ORTE_ERROR_LOG: Not found in
> file C:\OpenM*
>
> *PI\openmpi-1.6\orte\mca\ras\base\ras_base_allocate.c at line 200*
>
> *[SOUMIWHP5003567:01884] [[37936,0],0] ORTE_ERROR_LOG: Not found in
> file C:\OpenM*
>
> *PI\openmpi-1.6\orte\mca\plm\base\plm_base_launch_support.c at line 99*
>
> *[SOUMIWHP5003567:01884] [[37936,0],0] ORTE_ERROR_LOG: Not found in
> file C:\OpenM*
>
> *PI\openmpi-1.6\orte\mca\plm\process\plm_process_module.c at line 996*
>
> **
>
> What network settings should I be using? I'm sure this is because of
> the network because when I unplug the network cable, I get the error
> message I got below.
>
> Thanks,
>
> Vimal
>
> *From:*users-bounces_at_[hidden] [mailto:users-bounces_at_[hidden]]
> *On Behalf Of *Damien
> *Sent:* Friday, June 15, 2012 3:15 PM
> *To:* Open MPI Users
> *Subject:* Re: [OMPI users] Building MPI on Windows
>
> OK, that's what orte_rml_base_select failed means, no TCP connection.
> But you should be able to make OpenMPI & mpiexec work without a
> network if you're just running in local memory. There's probably a
> runtime parameter to set but I don't know what it is. Maybe Jeff or
> Shiqing can weigh in with what that is.
>
> Damien
>
> On 15/06/2012 1:10 PM, VimalMathew_at_[hidden]
> <mailto:VimalMathew_at_[hidden]> wrote:
>
> Just figured it out.
>
> The only thing different from when it ran yesterday to today was I was
> connected to a network. So I connected my laptop to a network and it
> worked again.
>
> Thanks for all your help, Damien!
>
> I'm sure I'm gonna get stuck more along the way so hoping you can help.
>
> --
>
> Vimal
>
> *From:*users-bounces_at_[hidden] <mailto:users-bounces_at_[hidden]>
> [mailto:users-bounces_at_[hidden]] *On Behalf Of *Damien
> *Sent:* Friday, June 15, 2012 2:57 PM
> *To:* Open MPI Users
> *Subject:* Re: [OMPI users] Building MPI on Windows
>
> Hmmm. Two things. Can you run helloworldMPI.exe on it's own? It
> should output "Number of threads = 1, My rank = 0"
>
> Also, can you post the output of ompi_info ? I think you might still
> have some path mixups. A successful OpenMPI build with this simple
> program should just work.
>
> If you still have the other OpenMPIs installed from the binaries, you
> might want to try uninstalling all of them and rebooting. Also if you
> rebuilt OpenMPI and helloworldMPI with VS 2010, make sure that
> helloworldMPI is actually linked to those VS2010 OpenMPI libs by
> setting the right lib path in the Linker options. Linking to VS2008
> libs and trying to run with VS2010 dlls/exes could cause problems too.
>
> Damien
>
> On 15/06/2012 11:44 AM, VimalMathew_at_[hidden]
> <mailto:VimalMathew_at_[hidden]> wrote:
>
> Hi Damien,
>
> I installed MS Visual Studio 2010 and tried the whole procedure again
> and it worked!
>
> That's the great news.
>
> Now the bad news is that I'm trying to run the program again using
> mpiexec and it won't!
>
> I get these error messages:
>
> orte_rml_base_select failed
>
> orte_ess_set_name failed, with a bunch of text saying it could be due
> to configuration or environment problems and will make sense only to
> an OpenMPI developer.
>
> Help!
>
> --
>
> Vimal
>
> *From:*users-bounces_at_[hidden] <mailto:users-bounces_at_[hidden]>
> [mailto:users-bounces_at_[hidden]] *On Behalf Of *Damien
> *Sent:* Thursday, June 14, 2012 4:55 PM
> *To:* Open MPI Users
> *Subject:* Re: [OMPI users] Building MPI on Windows
>
> You did build the project, right? The helloworldMPI.exe is in the
> Debug directory?
>
> On 14/06/2012 1:49 PM, VimalMathew_at_[hidden]
> <mailto:VimalMathew_at_[hidden]> wrote:
>
> No luck.
>
> Output:
>
> *Microsoft Windows [Version 6.1.7601]*
>
> *Copyright (c) 2009 Microsoft Corporation. All rights reserved.*
>
> **
>
> *C:\Users\...>cd "C:\Users\C9995799\Downloads\helloworldMPI\Debug"*
>
> **
>
> *C:\Users\...\Downloads\helloworldMPI\Debug>mpiexec -n 2
> helloworldMPI.exe*
>
> *--------------------------------------------------------------------------*
>
> *mpiexec was unable to launch the specified application as it could
> not find an e*
>
> *xecutable:*
>
> **
>
> *Executable: helloworldMPI.exe*
>
> *Node: SOUMIWHP5003567*
>
> **
>
> *while attempting to start process rank 0.*
>
> *--------------------------------------------------------------------------*
>
> *2 total processes failed to start*
>
> **
>
> *C:\Users\...\Downloads\helloworldMPI\Debug>*
>
> --
>
> Vimal
>
> *From:*users-bounces_at_[hidden] <mailto:users-bounces_at_[hidden]>
> [mailto:users-bounces_at_[hidden]] *On Behalf Of *Damien
> *Sent:* Thursday, June 14, 2012 3:38 PM
> *To:* Open MPI Users
> *Subject:* Re: [OMPI users] Building MPI on Windows
>
> Here's a MPI Hello World project based on your code. It runs fine on
> my machine. You'll need to change the include and lib paths as we
> discussed before to match your paths, and copy those bin files over to
> the Debug directory.
>
> Run it with this to start: "mpiexec -n 1 helloworldMPI.exe". Then
> change the -n 1 to -n x where x is the number of cores you have. Say
> yes to allowing mpiexec firewall access if that comes up.
>
> If this bombs out, there's something wrong on your machine.
>
> Damien
>
>
>
>
>
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